Perhaps he means that he got the bolts out of the guibo, but he can't remove the drive shaft? If his car is like the E36, the pilot shaft is still in the transmission. The drive shaft must be slid backwards so that the pilot shaft clears. This can be a pain.
Is your drive shaft 2 piece and have a slip collar in it? This looks like a large nut with a shroud on it. If so, loosen the collar. This will allow the front half of the shaft to slide to the back, allowing the drive shaft to be removed.
Some models might have the slip collar in the rear shaft. If so, you will need to remove the hangar bearing as well.